【Redis】SSM整合Redis&注解式缓存的使用

@Configuration
public class RedisConfig {

    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private int port;

    @Value("${spring.redis.timeout}")
    private int timeout;

    @Value("${spring.redis.password}")
    private String password;

    @Value("${spring.redis.database}")
    private int database;

    @Bean
    public JedisPool redisPoolFactory() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        JedisPool jedisPool = new JedisPool(jedisPoolConfig, host, port, timeout, password, database);
        return jedisPool;
    }
}

@Service
public class RedisService {

    @Autowired
    private JedisPool jedisPool;

    public String get(String key) {
        Jedis jedis = null;
        String value = null;
        try {
            jedis = jedisPool.getResource();
            value = jedis.get(key);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
        return value;
    }

    public String set(String key, String value) {
        Jedis jedis = null;
        try {
            jedis = jedisPool.getResource();
            jedis.set(key, value);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (jedis != null) {
                jedis.close();
            }
        }
        return value;
    }
}

@Service
public class UserService {

    @Autowired
    private RedisService redisService;

    @Cacheable(value = "user", key = "#id")
    public User findById(String id) {
        // 模拟从数据库查询用户
        User user = new User();
        user.setId(id);
        user.setName("张三");
        return user;
    }

    public void updateUser(User user) {
        // 模拟更新用户信息
        // ...
        // 更新后，清除缓存
        redisService.set(user.getId(), null);
    }
}